Fruit juice extractor



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B. R. DELERAY FRUIT JUICE EXTRACTOR Filed Aug. l5, 1928 en? A?. eZerzJ @i Patented Apr. 26, 1932 UNITED STATES PATENT oFFicE BERT R. DELERAY, OF LOS ANGELES, CALIFORNIA BRUIT JUICE EXTRAC'I'OR Application filed August 15, 1928. Serial No. 299,707.

This invention relates to a fruit juice exto prevent the juice from passing into the intiactor of the type disclosed in my applicaterior of the guide, tion for Letters Patent of the United States, Further objects of the invention will ap- Serial Number 268,127, entitled Juice expear hereinafter. tractor, and led April 7, 1928. The invention consists in the novel parts 55 In the extractordisclosed in that applicaand combination of pai-ts to be described tion, the construction included a sleeve exhereinafter, all of which contribute to protending upwardly from the Center f a bowl; duce 111 efficient fruit juice eXtraCtOr. the sleeve lwas provided with an internally A preferred embodiment of the invention' threaded bushing operating as a guide for is described in the following specification, 6o a plunger in the form 0f a rod having threads while the broad scope 'of the invention is co-operating with tliethreads of the bushing POIIlted out in the appended claims.

so that when the rod was depressed by press- In the drawings: A ingahalf-fruitagainst the burr at the upper Figure l is a vertical section through a end of the rod, the rod would rotate and Juice extractor embodying my invention. 65 thereby rotate the burr. A spring was pro- Figure 2 is a Side elevation of the inner vided below the end of the rod to return the guide tube or shell for guiding the plunger. saine to its elevated position after being de- Figure 3 is a cross-section through the deiressed. ln the operation of that device I viceon the line 2)3 of Figure l..

have found that the thread connection be- Flgure 4 is a section'through the device 70 tween the rod and the bushing offers too taken at the same point as Figure 3, but illusmuch Vresistance to enable the device to optratiiig another embodiment of the means for crate satisfactorily, and furthermore, it is venting the lower end of the guide cylinder or relatively expensive to form the threads in Shell.

the bushing and 0n the rod, In addition to In practicing the invention I provide a 75 this, the downward movement of the rod bowl l, preferably constructed of sheet metal, compresses air in the lower chamber in the havingarelatively large diameter at its upper lower part of the bushing, and this increases edge, and having a bottom, 2, which is preftlie resistance to the downward movement of erably made integral with the conical side- 3o the plunger, wall of the bowl. Extending up from the 80 The general object of this invention is to bottom 2, and preferably at the center thereof, provide a fruit uice extractor of this type, I provide a guide sleeve 3, preferably in the y but having improved means for guiding the form of a double-Walledtubular shell, that is plunger or rod in its up and down IHOVQ- t0 Say,llh1S Sleeve has 21H 1111161 tllbllltll'Sllell, 4:,

lnent; 31S@ to Provide means for Venting the anfl an Olltl tubular Sllfll 5.- The Outer Sllgll 85 chamber in the lower part of the guide, to 1S 0f conslderbly larger dlametel than line the atmosphere inner shell. This is for the purpose of giving ln this type of juice extractor the upwardthe Sie?? 3 Ug1d1ty-s0 that It i111 .Operate ly extending guide sleeve is subjected to conas? mgl pst exhelldmglup f1 om ih@ oottom siderable strain and one of the objects of the n Order O faclhtate me Centermg and at' 90 tacliinent of the shells 4 and 5 to the bottom preserit mventlorl 1S u.) provltle a' simpl? 001.1' 2, I prefer to form the bottom 2 with a cir- Sirllcilon for this gulde Whlch .Wlu give 1t cular bean 6, formed by offsetting the metal rigidity, and which at the same time will faof the bottom upwardly. (See Figure l.) clhtaLeCOnStructmg 1t l Such a Way as t0 The inner sleeve 4 is provided at its lower 9:'.

elfe@ th? necessefy rotation 0f the plunger end with an inwardly bent iange 7 which is as 1t relprocae brazed, soldered or riveted, or otherwise sefurther ObJeCt 0f the IHVGTIOD 1S t0 COD; cured, to the bottom 2 just inside of the bead '6. struct the burr carried by the upper end of The outer sleeve 5 is similarly provided with the plunger in such a way that it operates a flange 8 at its lower end, but this Harige im) the plunger.

projects outwardly and is brazed, soldered or riveted, or otherwise secured, to the bottom on the outer side of the bead 6. The bead 6 operates to center these two sleeves with resv ect to each other and rigidity in the` double-walled guide sleeve 3, formed by the two center sleeves.

The upper end of the outer sleeve 5 is formed with an integral annular head 9, which is formed integral with a substantially conical inner portion 10 that is formed into a guide 11 of reducedydi'agneter.

it the upper end of the sleeve 4, 1t' 1s provided with integral outwardly extending lugs 12, which abut against the annular shoulder 9 on their upper faces and at their edges abut against the inner face of the outer shelI 5.

The plunger guided in the sleeve may be of any suitable construction enabling itlto support a burr 13 that engages the under side of a. half-fruit to extract its juice. However, this plunger preferably comprises a piston.- like body 14, carryincl a rod 15 that is secured to it and that extends up through the neck 11 to carry the burr.

In' the operation of the device, the halffruit is pressed down on the burr. I provide guiding means for rotating the plunger as this takes lace. For this purpose I provide the wall o .the inner shell 4 with one or more helical guideways which may be in the form of slots. In the present instance. I provide two such helical slots 16. (See Figure 2.) These slots are located diametrically opposite to each other and are engaged by means projecting into the slots from the body 14 of The connection between the plunger and the sleeve 4 preferably consists of .a cross-pin 17, the ends of which are provided with rollers 18 respectively, that roll in the slots.

I provide a spring for returning the plunger after it has been depressed, and I prefer to provide a coil spring 19 for this purpose, located in the lower end of the inner sleeve 4 and thrusting at its upper end against the under side of the body 14 of the plunger.

rihe cross-pin 17 may also operate to secure the rod 15 to the body 14.

In order to cushion the plunger at the bottom of its down stroke, I provide a buffer or cushion 2O on the bottom 2 at the lower end of the inner shell 4. The rod 15 is preferably of tubular form, and in order to prevent its lower end from cutting into this louder, I turn the lower edge of the tube 15 inwardly vto form a head 21, leaving a vent opening 22 to permit air to pass up the rod 15 and find exit at vents 23 at the upper end of the rod. The buffer 20 may be made of leather, rubber, or any other similar soft material.

In order to cushion the end of the upstroke of the plunger, I provide an annular buffer 24, of soft material, attached to the assists in providing' upper face of the body 14 of the plunger. At the end of the up-stroke this buffer 24 strikes against the annular shoulder 9.

If desired, a packing ring 25 may be provided in the neck 11, which may be formed into an annular chamber 26 to receive the packine ring.

The Iaurr 13 is preferably of curved conical form, and is in the form of a shell having a hub 27 at its upper end secured to an angular or square neck 28 formed at the upper end of the tubular rod 15. In this way a conical cavity 29 is formed on the under side of the burr 13 to provide clearance as the burr descends. In other words, the lower edge 30 of the burr is located at or about the level of the neck 11, so that it operates as an apron to prevent. the extracted juice from splashing onto the side of the rod 15 in such a way that it could be carried into the interior of the sleeve. In this way I protect the plunger and the interior of the sleeve from' contact with the juices, which are acid and which would tend to corrode the metal parts.

As regards the feature of venting the lower end of the sleeve 4 to the atmosphere, it should be understood that as the body 14 of the plunger descends, and after its lower end passes the lower ends of the slots 16, the body 14 would operate to compress air in the lower end of the sleeve. However, this air may escape through the tubular plunger 15.

If desired, an additional vent may be provided by forining an opening 31 through the wall of the inner sleeve 4 near its lower end, so as to permit the air to escape into the annular space 32 in the wall of the post 3.

If desired, another vent opening 33 can be prpvided in the outer wall 5 near its upper en Instead of venting the lower end of the guide sleeve 3 in this way, I may vent it in the manner illustrated in Figure 4, by providing the body 14 with a' plurality of openings 34\passing vertically through it.

By reason of the fact that the cross-pin 17 is engaged at dian'ietricaly opposite points with respect to the axis of the plunger, by the edges of the slots 16, it -will be evident that the forces acting upon the plunger to rotate it constitute a couple. For this reason there is practically no lateral strain on the plunger and it rotates with great freedom.

It is advantageousto give the guide tube 4 considerable diameter. By doing this, the reactive forces of the edges of the slots on the ends of the pin 17 are greatly reduced.

It is understood that the embodiment of the invention described herein is only one of the many embodiments this invention may take, and I do not wish to be limited in the practice of the invention, nor in the claims, to the particular embodiment set forth.

What I claim is:

1. In a fruit juice extractor, the combination of a guide in the form of a cylinder, a plunger mounted to slide in the guide, a burr carried by the plunger` adapted to rotate and extract the juice of a half-fruit when pressed down upon the saine, means associated with the guide for rotating the plunger when the same is depressed by the pressure of the fruit against the burr, means for venting the interior of the cylinder below the plunger to permit free downward movement of the plunger, and means for returning the plunger, a bowl, and means for attaching the base of the cylinder to the bowl to seal the interior of the cylinder from the entry of fruit juices.

2. In a fruit juice extractor, the combination of a guide in the form of a cylinder, a plunger mounted to slide in the guide, a burr carried by the plunger adapted to rotate and extract the juice of a half-fruit when pressed down upon the saine, said cylinder having a pair of oppositely disposed helical guide Ways in the wall thereof, said plunger having a pin with its ends projecting into the said guide ways and operating to rotate the plunger when the same is depressed by the pressure of the fruit against the burr, and a spring cooperating with the plunger to return the saine to an elevated position after it has been depressed.

3. In a fruit juice extractor, the combination ola guide in the form of a cylinder, a plunger mounted to slide in the guide, a burr carried by the plunger adapted to rotate and extract the juice of a half-fruit when pressed down upon the same, said cylinder having a pair of opposite helical slots in the wall thereof, a transverse pin securing the plunger to the rod, with its ends projecting into the said slots and cooperating with the slots to rotate the plunger when the saine is depressed by the pressureof the fruit against the burr, and a spring in the 'lower end of the cylinder to return the plunger toits elevated position after it has been depressed.

el. In a fruit juice extractor, the combinatio'n of a bowl having a bottom with an upwardly extending post, said post having an inner tubular shell and an outer liquidtight tubular shell rigidly secured to the lsaid bottom. a plunger guided in the inner tubular shell and having a rod secured thereto and extending upwardly above the upper end of the post, a burr carried by the upper end of the rod adapted to rotate and extract the juice ot a half-fruit when pressed down upon the same, said inner tubular shell having a pair of oppositely disposed helical guide slots formed therein, said plunger having means projecting into the said guide slots cooperating with the same to rotate the plunger when the saine is depressed by the pressure ot the fruit against the burr. and a spring for rcturning the plunger to its elevated position after the saine has been depressed.

5. In a fruit juice extractor, the combina-4 Vof the rod adapted to rotate and extract the juice of a half-fruit when pressed down upon the same, said inner tubular shell having a pair of oppositely disposed helical guide slots formed therein, said plunger having means projecting into the said guide slots cooperating with the same to rotate the plunger when the same is depressed by the pressure of the fruit against the burr7 and a spring for returning the plunger to its elevated position after the same has been depressed, and a butler for cushioning the plunger at the end ot' its downward movement.

6. In a fruit juice extractor, the combination of a bowl having a bottom with an upwardly extending post, said post having an inner tubular shell and au outer liquid-tight tubular shell rigidly secured to the said bottom, a plunger guided in the inner tubular shell and having a rod secured thereto a'iid extending upwardly above the upper end ot the post, a burr carried by the upper end of the rod adapted to rotate and extract the juice of a halt-fruit when pressed down upon the saine, said inner tubular shell having a pair of oppositely disposed helical guidey slots formed therein. said plunger having means projecting into the said guide slots co-operating with the same to rotate the plunger when the saine is depressed by the\pressure of the fruit against the burr, and a spring for returning thc plunger to its elevated position after the saine. has been depressed, and a buffer for cushioning the plunger at the end of its upward stroke.

7. In a truit juice extractor, the combination of a guide in the torni ot a tubular shell formed ot' a ltlat plate rolled into icylindrical forni and having a helical slot torlned in the wall thereof, a plunger mounted to slide in the guide and having n1 ans engaging the slot to cause rotation of the plunger when the same is depressed, a burr carried by the plunger adapted to rotate and extract the juice ot a half-fruit when pressed down upon the same. and nleuns for returning the plunger to its elevated position after the saine has been depressed.

8. In a fruit juice extractor. the eonibination of a bowl having an upwardly extending post projecting up troni its bottoni. a plunger guided to reciprocate in the said post, a burr attached to the upper end of the plunger having substantialljvv the forni ot a conical shell` witlrthe lower edge ot the shell extending down to about the level of the upper end of the post, whereby the lower edge of the burr operates as an apron to prevent extracted juice from passing into the guide.

9. In a fruit juice extractor, the combination of a tubular post supported with its axis substantially vertical, a plunger guided to move up and down in the said post, said post having slots on the interior thereof, said plunger having two members projecting outwardly therefrom and engaging the slots at diametrically opposite points to cause a rotation of the plunger when the same is depressed, a stem attached to the plunger and extending upwardly past the upper end of the post, and a burr carried by the upper end of the stem to receive the half-fruit and operating when depressed hy pressure on the half-fruit, to cause rotation of the burr.

l0. In a fruit juice extractor, the combination ot.' a bowl, a guide in the form of a cylinder extending up from the bottom ofthe bowl, a plunger mounted to slide in the guide, an outer liquid-tight sleeve surrounding the lafuide and excludingr the juice from the guide, a burr carried by the plunger adapted to rotate and extract the juice ot a half-'fruit when pressed down upon the same, means associated with the guide for rotating` theiplunger when the same is depressed by the pressure of the fruit against the burr, means for venting the interior of the cylinder below the plunger to permit free downward movement of the plunger, and means for returning the plunger.

ll. In a fruit juice extractor, the combination of a bowl. a guide in the form of a cylinder extending up from the bottom of the bowl, a plunger with a rod, mounted to slide in the guide, a liquid-tight outer Sleeve enveloping the guide and excluding the juices from the guide, a burr carried by the rod, adapted to rotate with the plunger and extract the juice of a half-fruit when pressed down upon the same, means associated with the guide for rotating the plunger when the same is depressed by the pressure of the fruit against the burr, said rod being of tubular form so as to present an air duct extending upwardly from the lower end thereof to the upper end, the upper end ot` said plunger above the guide having vents therein to permit free ingress and egress ot air from the cylinder when the plunger is reciprocated.

12. In a fruit juice extractor, the combination of a tubular post supported with its axis substantially vertical, a plunger mounted within the post. said post and said plunger having cooperating means on one side of the axis including a helical guii'lc-way, and having cooperating guide means located on the opposite side ot' the post and including a sec- 0nd helical guide-way, said plunger having a member extending transverse to said post and .having` portions engaging both ot said guideways, said plunger having a stein of 

